The Cloud Control Research On The Drive System Of The Electric Vehicle

The Electric vehicle which produces little pollution and noise, economize energy sources, the structure, the control and the maintenance is simple, compared with the tradition car, the Electric vehicle has many outstanding advantages. As a kind of free pollution and green vehicle the Electric vehicle has already attracted many departments attention all over the world, the automobile manufactory is studying the possibility which will be extensive applied actively. However it still exists various kind of problems and must be resolved, the function of the electronics drive system of the Electric vehicle is one of the key problems to study. The different usages of the electric vehicle have different requests in the drive system, but various kind of drive systems are all kinds of torque control system, so the fast, accurate, reliably control the torque of the drives electric machine, is important in the research field of the Electric vehicle.The chapter 1 expresses the development of the Electric vehicle and its core techniques, and analyzes the research present condition of the domestic and international Electric vehicle currently. It puts forward a kind of method in making use of two dimensions cloud model to control the drive system. Because the developed countries are subjected to huge press of resource of oil and the pollution of the environments, it has already neared to the degree of commercialization to the research of the Electric vehicle, and the research level on Electric vehicle is more behindhand than the overseas.The Chapter2 introduces cloud theory definition and related knowledge, including two dimensions cloud model, cloud produce machine, and normal cloud model and cloudy account. Cloud pattern method is founded on the traditional fuzzy set theory that introduces into the thought of statistics; expands the precision of the subject function to the uncertain character on statistical distribution.The chapter3 analyzes the core techniques of the Electric vehicle in detail, including motor drive system, electric drive system and the torque follow system of the Electric vehicle. It analyzes and compares the direct current motor drive systemand AC motor drive system and includes the theory of motor running, at last we bring forward some solutions to control the torque.In the chapter4, building up the whole vehicle movement mathematics model, I set up the two dimensions cloud model of the Electric vehicle; construct the cloud model controller, research Control strategy. It introduced into the control rule on the real-time adjusting input, availably improved the system character of the torque response, and utilized the Matlab to simulate the control system. The experimentation result shows that the control method adopted has many good personalities, such as the fast response speed, stable running and good operation performance.Chapter 5 makes a conclusion of the writer's research work on this dissertation, summarizes the main work, technical development in related areas, the navigation of improvement on the system, the technical method probably adopted and more related information.